Metallic spool



Patented Feb. 24, 1931 UNITED STATES PATENT OFFICE THOMAS GEORGEBAXENDEN, OF WATFORD, AND JOHN ROBERT COLLYEAR, OF BUSHEY, ENGLANDMETALLIC SPOOL Application filed July 18, 1928, Serial No. 293,567, andin Great Britain October 7, 1927.

This invention relates to spools which are provided with central stubspindles extending beyond the outer sides of the end discs, and inparticular to small spools of this kind, such as are used forphotographic These stub spindles at the present time are sometimesformed by extending the ends of the main spindle through the discs, orelse they consist of short stub spindles of tubular or solid form forcedinto the ends of a tubular main spindle on the extreme ends of which thediscs are mounted.

According to the present invention, the end stub spindles are formed ofmetal in one with the end discs by drawing, pressing, spinning orsimilar processes. The main or body part of the spool spindle whichconnects the end discs may. be fitted thereto by welding, brazing orsoldering, for example, in the manner described in British Patent No.234,610; alternatively, the ends of the main spindle may be forced intothe hollow stub spindles, or connected thereto in any other suitablemanner.

The stub spindles or one of them may be slit or otherwise adapted toform the driving connection for the spool.

The accompanying drawing shows two forms of the improved spool.

Fig. 1 is a longitudinal section showing one construction,

Fig. 2 is a part longitudinal section showing a modified construction.

In the construction shown in Fig. 1, the stub spindles a are made in onewith the end discs 6 by drawing and the ends of the main spindle c,which is of tubular form, are welded to the end discs I).

In the construction shown in Fig. 2, the end discs 6 have the integralstub spindles drawn up from the metal thereof and the ends of the mainspindle (Z are forced into the sockets formed by the hollow stubspindles for the purpose of securing the parts together.

In both constructions one of the stub spindles is slit, as at e to formthe usual driving connection.

We claim-- 1. A built up photographic film spool comprising incombination, a pair of metallic end discs, each disc having an integraldrawn stub, the stub on one of said discs being formed with a cross slotto' receive a winding key, and a tubular spindle welded at its ends tothe metallic discs, the stubs of the discs projecting outwardly to formtrunnions for the spool.

2. A photographic spool comprising inet-allic discs, a spindle formed ofsheet metal rolled upon itself to provide a split tube and welded at itsends to the central portions of the discs, the discs having integraldrawn trunnions extending outwardly thereof, and the spindle having alongitudinal slot between the ends of said tube to receive the end ofthe paper strip of a loaded photographic spool, one of the trunnionshaving a key receiving slot.

THOMAS GEORGE BAXENDEN. JOHN ROBERT OOLLYEAR.

